It
is thought the dress was given to Kim to wear as the Beckhams and
Murray are both managed by Simon Fuller’s XIX Entertainment, offering
Mrs Beckham unrivalled free advertising in front of millions of
television viewers.

Couple: Murray and Miss Sears are pictured at London fashion parties in 2011 (left) and last September (right)

Early days: Murray kisses Miss Sears after beating Lleyton Hewitt in a match in San Jose, California, in 2006

Six years ago: An injured Murray watches tennis with Miss Sears from a balcony at Wimbledon in June 2007

Last year Miss Sears was loaned a pair of £300 Victoria Beckham sunglasses to wear for the Wimbledon finals, when Murray lost to Roger Federer.

Miss Sears was still a teenager in the sixth form when she met Murray through her father Nigel, the head of UK women’s tennis coaching.

'No… I haven’t thought about that yet'

Murray responds to question on whether he is ready to marry girlfriend Kim Sears

The pair were introduced at a tournament in America and Murray wooed her with flowers and texts.

The couple moved in together in 2009 before splitting briefly. Six months later, they reunited after discovering they were miserable apart.

Those close to Murray have said Miss Sears would be the perfect tennis wife because she brings ‘calmness’ to him while he is on court.

Murray has hinted in the past that marriage is something Miss Sears would want, but has always said they were not at the right stage in their lives.

Last year he said: ‘I have no plans to get married right now. I am still fairly young. But we’ll see.’